print-tree.c

   1 /*
   2  * Copyright (C) 2007 Oracle.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <uuid/uuid.h>
  22 #include "kerncompat.h"
  23 #include "radix-tree.h"
  24 #include "ctree.h"
  25 #include "disk-io.h"
  26 #include "print-tree.h"
  27 #include "utils.h"
  28
  29
  30 static void print_dir_item_type(struct extent_buffer *eb,
  31                                 struct btrfs_dir_item *di)
  32 {
  33         u8 type = btrfs_dir_type(eb, di);
  34
  35         switch (type) {
  36         case BTRFS_FT_REG_FILE:
  37                 printf("FILE");
  38                 break;
  39         case BTRFS_FT_DIR:
  40                 printf("DIR");
  41                 break;
  42         case BTRFS_FT_CHRDEV:
  43                 printf("CHRDEV");
  44                 break;
  45         case BTRFS_FT_BLKDEV:
  46                 printf("BLKDEV");
  47                 break;
  48         case BTRFS_FT_FIFO:
  49                 printf("FIFO");
  50                 break;
  51         case BTRFS_FT_SOCK:
  52                 printf("SOCK");
  53                 break;
  54         case BTRFS_FT_SYMLINK:
  55                 printf("SYMLINK");
  56                 break;
  57         case BTRFS_FT_XATTR:
  58                 printf("XATTR");
  59                 break;
  60         default:
  61                 printf("%u", type);
  62         }
  63 }
  64
  65 static int print_dir_item(struct extent_buffer *eb, struct btrfs_item *item,
  66                           struct btrfs_dir_item *di)
  67 {
  68         u32 total;
  69         u32 cur = 0;
  70         u32 len;
  71         u32 name_len;
  72         u32 data_len;
  73         char namebuf[BTRFS_NAME_LEN];
  74         struct btrfs_disk_key location;
  75
  76         total = btrfs_item_size(eb, item);
  77         while(cur < total) {
  78                 btrfs_dir_item_key(eb, di, &location);
  79                 printf("\t\tlocation ");
  80                 btrfs_print_key(&location);
  81                 printf(" type ");
  82                 print_dir_item_type(eb, di);
  83                 printf("\n");
  84                 name_len = btrfs_dir_name_len(eb, di);
  85                 data_len = btrfs_dir_data_len(eb, di);
  86                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
  87                 read_extent_buffer(eb, namebuf, (unsigned long)(di + 1), len);
  88                 printf("\t\tnamelen %u datalen %u name: %.*s\n",
  89                        name_len, data_len, len, namebuf);
  90                 if (data_len) {
  91                         len = (data_len <= sizeof(namebuf))? data_len: sizeof(namebuf);
  92                         read_extent_buffer(eb, namebuf,
  93                                 (unsigned long)(di + 1) + name_len, len);
  94                         printf("\t\tdata %.*s\n", len, namebuf);
  95                 }
  96                 len = sizeof(*di) + name_len + data_len;
  97                 di = (struct btrfs_dir_item *)((char *)di + len);
  98                 cur += len;
  99         }
 100         return 0;
 101 }
 102
 103 static int print_inode_extref_item(struct extent_buffer *eb,
 104                                    struct btrfs_item *item,
 105                                    struct btrfs_inode_extref *extref)
 106 {
 107         u32 total;
 108         u32 cur = 0;
 109         u32 len;
 110         u32 name_len = 0;
 111         u64 index = 0;
 112         u64 parent_objid;
 113         char namebuf[BTRFS_NAME_LEN];
 114
 115         total = btrfs_item_size(eb, item);
 116
 117         while (cur < total) {
 118                 index = btrfs_inode_extref_index(eb, extref);
 119                 name_len = btrfs_inode_extref_name_len(eb, extref);
 120                 parent_objid = btrfs_inode_extref_parent(eb, extref);
 121
 122                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
 123
 124                 read_extent_buffer(eb, namebuf, (unsigned long)(extref->name), len);
 125
 126                 printf("\t\tinode extref index %llu parent %llu namelen %u "
 127                        "name: %.*s\n",
 128                        (unsigned long long)index,
 129                        (unsigned long long)parent_objid,
 130                        name_len, len, namebuf);
 131
 132                 len = sizeof(*extref) + name_len;
 133                 extref = (struct btrfs_inode_extref *)((char *)extref + len);
 134                 cur += len;
 135         }
 136         return 0;
 137 }
 138
 139 static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *item,
 140                                 struct btrfs_inode_ref *ref)
 141 {
 142         u32 total;
 143         u32 cur = 0;
 144         u32 len;
 145         u32 name_len;
 146         u64 index;
 147         char namebuf[BTRFS_NAME_LEN];
 148         total = btrfs_item_size(eb, item);
 149         while(cur < total) {
 150                 name_len = btrfs_inode_ref_name_len(eb, ref);
 151                 index = btrfs_inode_ref_index(eb, ref);
 152                 len = (name_len <= sizeof(namebuf))? name_len: sizeof(namebuf);
 153                 read_extent_buffer(eb, namebuf, (unsigned long)(ref + 1), len);
 154                 printf("\t\tinode ref index %llu namelen %u name: %.*s\n",
 155                        (unsigned long long)index, name_len, len, namebuf);
 156                 len = sizeof(*ref) + name_len;
 157                 ref = (struct btrfs_inode_ref *)((char *)ref + len);
 158                 cur += len;
 159         }
 160         return 0;
 161 }
 162
 163 void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 164 {
 165         int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
 166         int i;
 167         printf("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
 168                (unsigned long long)btrfs_chunk_length(eb, chunk),
 169                (unsigned long long)btrfs_chunk_owner(eb, chunk),
 170                (unsigned long long)btrfs_chunk_type(eb, chunk),
 171                num_stripes);
 172         for (i = 0 ; i < num_stripes ; i++) {
 173                 printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
 174                       (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
 175                       (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
 176         }
 177 }
 178
 179 static void print_dev_item(struct extent_buffer *eb,
 180                            struct btrfs_dev_item *dev_item)
 181 {
 182         char disk_uuid_c[BTRFS_UUID_UNPARSED_SIZE];
 183         u8 disk_uuid[BTRFS_UUID_SIZE];
 184
 185         read_extent_buffer(eb, disk_uuid,
 186                            (unsigned long)btrfs_device_uuid(dev_item),
 187                            BTRFS_UUID_SIZE);
 188         uuid_unparse(disk_uuid, disk_uuid_c);
 189         printf("\t\tdev item devid %llu "
 190                "total_bytes %llu bytes used %Lu\n"
 191                "\t\tdev uuid %s\n",
 192                (unsigned long long)btrfs_device_id(eb, dev_item),
 193                (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
 194                (unsigned long long)btrfs_device_bytes_used(eb, dev_item),
 195                disk_uuid_c);
 196 }
 197
 198 static void print_uuids(struct extent_buffer *eb)
 199 {
 200         char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
 201         char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
 202         u8 disk_uuid[BTRFS_UUID_SIZE];
 203
 204         read_extent_buffer(eb, disk_uuid, btrfs_header_fsid(),
 205                            BTRFS_FSID_SIZE);
 206
 207         fs_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 208         uuid_unparse(disk_uuid, fs_uuid);
 209
 210         read_extent_buffer(eb, disk_uuid,
 211                            btrfs_header_chunk_tree_uuid(eb),
 212                            BTRFS_UUID_SIZE);
 213
 214         chunk_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
 215         uuid_unparse(disk_uuid, chunk_uuid);
 216         printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 217 }
 218
 219 static void print_file_extent_item(struct extent_buffer *eb,
 220                                    struct btrfs_item *item,
 221                                    int slot,
 222                                    struct btrfs_file_extent_item *fi)
 223 {
 224         int extent_type = btrfs_file_extent_type(eb, fi);
 225
 226         if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 227                 printf("\t\tinline extent data size %u "
 228                        "ram %u compress %d\n",
 229                   btrfs_file_extent_inline_item_len(eb, item),
 230                   btrfs_file_extent_inline_len(eb, slot, fi),
 231                   btrfs_file_extent_compression(eb, fi));
 232                 return;
 233         }
 234         if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 235                 printf("\t\tprealloc data disk byte %llu nr %llu\n",
 236                   (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 237                   (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 238                 printf("\t\tprealloc data offset %llu nr %llu\n",
 239                   (unsigned long long)btrfs_file_extent_offset(eb, fi),
 240                   (unsigned long long)btrfs_file_extent_num_bytes(eb, fi));
 241                 return;
 242         }
 243         printf("\t\textent data disk byte %llu nr %llu\n",
 244                 (unsigned long long)btrfs_file_extent_disk_bytenr(eb, fi),
 245                 (unsigned long long)btrfs_file_extent_disk_num_bytes(eb, fi));
 246         printf("\t\textent data offset %llu nr %llu ram %llu\n",
 247                 (unsigned long long)btrfs_file_extent_offset(eb, fi),
 248                 (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
 249                 (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
 250         printf("\t\textent compression %d\n",
 251                btrfs_file_extent_compression(eb, fi));
 252 }
 253
 254 static void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 255 {
 256         struct btrfs_extent_item *ei;
 257         struct btrfs_extent_inline_ref *iref;
 258         struct btrfs_extent_data_ref *dref;
 259         struct btrfs_shared_data_ref *sref;
 260         struct btrfs_disk_key key;
 261         unsigned long end;
 262         unsigned long ptr;
 263         int type;
 264         u32 item_size = btrfs_item_size_nr(eb, slot);
 265         u64 flags;
 266         u64 offset;
 267
 268         if (item_size < sizeof(*ei)) {
 269 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 270                 struct btrfs_extent_item_v0 *ei0;
 271                 BUG_ON(item_size != sizeof(*ei0));
 272                 ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
 273                 printf("\t\textent refs %u\n",
 274                        btrfs_extent_refs_v0(eb, ei0));
 275                 return;
 276 #else
 277                 BUG();
 278 #endif
 279         }
 280
 281         ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
 282         flags = btrfs_extent_flags(eb, ei);
 283
 284         printf("\t\textent refs %llu gen %llu flags %llu\n",
 285                (unsigned long long)btrfs_extent_refs(eb, ei),
 286                (unsigned long long)btrfs_extent_generation(eb, ei),
 287                (unsigned long long)flags);
 288
 289         if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
 290                 struct btrfs_tree_block_info *info;
 291                 info = (struct btrfs_tree_block_info *)(ei + 1);
 292                 btrfs_tree_block_key(eb, info, &key);
 293                 printf("\t\ttree block ");
 294                 btrfs_print_key(&key);
 295                 printf(" level %d\n", btrfs_tree_block_level(eb, info));
 296                 iref = (struct btrfs_extent_inline_ref *)(info + 1);
 297         } else if (metadata) {
 298                 struct btrfs_key tmp;
 299
 300                 btrfs_item_key_to_cpu(eb, &tmp, slot);
 301                 printf("\t\ttree block skinny level %d\n", (int)tmp.offset);
 302                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 303         } else{
 304                 iref = (struct btrfs_extent_inline_ref *)(ei + 1);
 305         }
 306
 307         ptr = (unsigned long)iref;
 308         end = (unsigned long)ei + item_size;
 309         while (ptr < end) {
 310                 iref = (struct btrfs_extent_inline_ref *)ptr;
 311                 type = btrfs_extent_inline_ref_type(eb, iref);
 312                 offset = btrfs_extent_inline_ref_offset(eb, iref);
 313                 switch (type) {
 314                 case BTRFS_TREE_BLOCK_REF_KEY:
 315                         printf("\t\ttree block backref root %llu\n",
 316                                (unsigned long long)offset);
 317                         break;
 318                 case BTRFS_SHARED_BLOCK_REF_KEY:
 319                         printf("\t\tshared block backref parent %llu\n",
 320                                (unsigned long long)offset);
 321                         break;
 322                 case BTRFS_EXTENT_DATA_REF_KEY:
 323                         dref = (struct btrfs_extent_data_ref *)(&iref->offset);
 324                         printf("\t\textent data backref root %llu "
 325                                "objectid %llu offset %llu count %u\n",
 326                                (unsigned long long)btrfs_extent_data_ref_root(eb, dref),
 327                                (unsigned long long)btrfs_extent_data_ref_objectid(eb, dref),
 328                                (unsigned long long)btrfs_extent_data_ref_offset(eb, dref),
 329                                btrfs_extent_data_ref_count(eb, dref));
 330                         break;
 331                 case BTRFS_SHARED_DATA_REF_KEY:
 332                         sref = (struct btrfs_shared_data_ref *)(iref + 1);
 333                         printf("\t\tshared data backref parent %llu count %u\n",
 334                                (unsigned long long)offset,
 335                                btrfs_shared_data_ref_count(eb, sref));
 336                         break;
 337                 default:
 338                         return;
 339                 }
 340                 ptr += btrfs_extent_inline_ref_size(type);
 341         }
 342         WARN_ON(ptr > end);
 343 }
 344
 345 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 346 static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
 347 {
 348         struct btrfs_extent_ref_v0 *ref0;
 349
 350         ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
 351         printf("\t\textent back ref root %llu gen %llu "
 352                 "owner %llu num_refs %lu\n",
 353                 (unsigned long long)btrfs_ref_root_v0(eb, ref0),
 354                 (unsigned long long)btrfs_ref_generation_v0(eb, ref0),
 355                 (unsigned long long)btrfs_ref_objectid_v0(eb, ref0),
 356                 (unsigned long)btrfs_ref_count_v0(eb, ref0));
 357 }
 358 #endif
 359
 360 static void print_root_ref(struct extent_buffer *leaf, int slot, char *tag)
 361 {
 362         struct btrfs_root_ref *ref;
 363         char namebuf[BTRFS_NAME_LEN];
 364         int namelen;
 365
 366         ref = btrfs_item_ptr(leaf, slot, struct btrfs_root_ref);
 367         namelen = btrfs_root_ref_name_len(leaf, ref);
 368         read_extent_buffer(leaf, namebuf, (unsigned long)(ref + 1), namelen);
 369         printf("\t\troot %s key dirid %llu sequence %llu name %.*s\n", tag,
 370                (unsigned long long)btrfs_root_ref_dirid(leaf, ref),
 371                (unsigned long long)btrfs_root_ref_sequence(leaf, ref),
 372                namelen, namebuf);
 373 }
 374
 375 static int count_bytes(void *buf, int len, char b)
 376 {
 377         int cnt = 0;
 378         int i;
 379         for (i = 0; i < len; i++) {
 380                 if (((char*)buf)[i] == b)
 381                         cnt++;
 382         }
 383         return cnt;
 384 }
 385
 386 static void print_root(struct extent_buffer *leaf, int slot)
 387 {
 388         struct btrfs_root_item *ri;
 389         struct btrfs_root_item root_item;
 390         int len;
 391         char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 392
 393         ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
 394         len = btrfs_item_size_nr(leaf, slot);
 395
 396         memset(&root_item, 0, sizeof(root_item));
 397         read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 398
 399         printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu\n",
 400                 (unsigned long long)btrfs_root_bytenr(&root_item),
 401                 btrfs_root_level(&root_item),
 402                 (unsigned long long)btrfs_root_dirid(&root_item),
 403                 btrfs_root_refs(&root_item),
 404                 (unsigned long long)btrfs_root_generation(&root_item));
 405
 406         if (root_item.generation == root_item.generation_v2) {
 407                 uuid_unparse(root_item.uuid, uuid_str);
 408                 printf("\t\tuuid %s\n", uuid_str);
 409                 if (count_bytes(root_item.parent_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 410                         uuid_unparse(root_item.parent_uuid, uuid_str);
 411                         printf("\t\tparent_uuid %s\n", uuid_str);
 412                 }
 413                 if (count_bytes(root_item.received_uuid, BTRFS_UUID_SIZE, 0) != BTRFS_UUID_SIZE) {
 414                         uuid_unparse(root_item.received_uuid, uuid_str);
 415                         printf("\t\treceived_uuid %s\n", uuid_str);
 416                 }
 417                 if (root_item.ctransid) {
 418                         printf("\t\tctransid %llu otransid %llu stransid %llu rtransid %llu\n",
 419                                 btrfs_root_ctransid(&root_item),
 420                                 btrfs_root_otransid(&root_item),
 421                                 btrfs_root_stransid(&root_item),
 422                                 btrfs_root_rtransid(&root_item));
 423                 }
 424         }
 425         if (btrfs_root_refs(&root_item) == 0) {
 426                 struct btrfs_key drop_key;
 427                 btrfs_disk_key_to_cpu(&drop_key,
 428                                       &root_item.drop_progress);
 429                 printf("\t\tdrop ");
 430                 btrfs_print_key(&root_item.drop_progress);
 431                 printf(" level %d\n", root_item.drop_level);
 432         }
 433 }
 434
 435 static void print_free_space_header(struct extent_buffer *leaf, int slot)
 436 {
 437         struct btrfs_free_space_header *header;
 438         struct btrfs_disk_key location;
 439
 440         header = btrfs_item_ptr(leaf, slot, struct btrfs_free_space_header);
 441         btrfs_free_space_key(leaf, header, &location);
 442         printf("\t\tlocation ");
 443         btrfs_print_key(&location);
 444         printf("\n");
 445         printf("\t\tcache generation %llu entries %llu bitmaps %llu\n",
 446                (unsigned long long)btrfs_free_space_generation(leaf, header),
 447                (unsigned long long)btrfs_free_space_entries(leaf, header),
 448                (unsigned long long)btrfs_free_space_bitmaps(leaf, header));
 449 }
 450
 451 static void print_key_type(u64 objectid, u8 type)
 452 {
 453         if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID) {
 454                 printf("UNTYPED");
 455                 return;
 456         }
 457
 458         switch (type) {
 459         case BTRFS_INODE_ITEM_KEY:
 460                 printf("INODE_ITEM");
 461                 break;
 462         case BTRFS_INODE_REF_KEY:
 463                 printf("INODE_REF");
 464                 break;
 465         case BTRFS_INODE_EXTREF_KEY:
 466                 printf("INODE_EXTREF");
 467                 break;
 468         case BTRFS_DIR_ITEM_KEY:
 469                 printf("DIR_ITEM");
 470                 break;
 471         case BTRFS_DIR_INDEX_KEY:
 472                 printf("DIR_INDEX");
 473                 break;
 474         case BTRFS_DIR_LOG_ITEM_KEY:
 475                 printf("DIR_LOG_ITEM");
 476                 break;
 477         case BTRFS_DIR_LOG_INDEX_KEY:
 478                 printf("DIR_LOG_INDEX");
 479                 break;
 480         case BTRFS_XATTR_ITEM_KEY:
 481                 printf("XATTR_ITEM");
 482                 break;
 483         case BTRFS_ORPHAN_ITEM_KEY:
 484                 printf("ORPHAN_ITEM");
 485                 break;
 486         case BTRFS_ROOT_ITEM_KEY:
 487                 printf("ROOT_ITEM");
 488                 break;
 489         case BTRFS_ROOT_REF_KEY:
 490                 printf("ROOT_REF");
 491                 break;
 492         case BTRFS_ROOT_BACKREF_KEY:
 493                 printf("ROOT_BACKREF");
 494                 break;
 495         case BTRFS_EXTENT_ITEM_KEY:
 496                 printf("EXTENT_ITEM");
 497                 break;
 498         case BTRFS_METADATA_ITEM_KEY:
 499                 printf("METADATA_ITEM");
 500                 break;
 501         case BTRFS_TREE_BLOCK_REF_KEY:
 502                 printf("TREE_BLOCK_REF");
 503                 break;
 504         case BTRFS_SHARED_BLOCK_REF_KEY:
 505                 printf("SHARED_BLOCK_REF");
 506                 break;
 507         case BTRFS_EXTENT_DATA_REF_KEY:
 508                 printf("EXTENT_DATA_REF");
 509                 break;
 510         case BTRFS_SHARED_DATA_REF_KEY:
 511                 printf("SHARED_DATA_REF");
 512                 break;
 513         case BTRFS_EXTENT_REF_V0_KEY:
 514                 printf("EXTENT_REF_V0");
 515                 break;
 516         case BTRFS_CSUM_ITEM_KEY:
 517                 printf("CSUM_ITEM");
 518                 break;
 519         case BTRFS_EXTENT_CSUM_KEY:
 520                 printf("EXTENT_CSUM");
 521                 break;
 522         case BTRFS_EXTENT_DATA_KEY:
 523                 printf("EXTENT_DATA");
 524                 break;
 525         case BTRFS_BLOCK_GROUP_ITEM_KEY:
 526                 printf("BLOCK_GROUP_ITEM");
 527                 break;
 528         case BTRFS_CHUNK_ITEM_KEY:
 529                 printf("CHUNK_ITEM");
 530                 break;
 531         case BTRFS_DEV_ITEM_KEY:
 532                 printf("DEV_ITEM");
 533                 break;
 534         case BTRFS_DEV_EXTENT_KEY:
 535                 printf("DEV_EXTENT");
 536                 break;
 537         case BTRFS_BALANCE_ITEM_KEY:
 538                 printf("BALANCE_ITEM");
 539                 break;
 540         case BTRFS_DEV_REPLACE_KEY:
 541                 printf("DEV_REPLACE_ITEM");
 542                 break;
 543         case BTRFS_STRING_ITEM_KEY:
 544                 printf("STRING_ITEM");
 545                 break;
 546         case BTRFS_QGROUP_STATUS_KEY:
 547                 printf("BTRFS_STATUS_KEY");
 548                 break;
 549         case BTRFS_QGROUP_RELATION_KEY:
 550                 printf("BTRFS_QGROUP_RELATION_KEY");
 551                 break;
 552         case BTRFS_QGROUP_INFO_KEY:
 553                 printf("BTRFS_QGROUP_INFO_KEY");
 554                 break;
 555         case BTRFS_QGROUP_LIMIT_KEY:
 556                 printf("BTRFS_QGROUP_LIMIT_KEY");
 557                 break;
 558         case BTRFS_DEV_STATS_KEY:
 559                 printf("DEV_STATS_ITEM");
 560                 break;
 561         case BTRFS_UUID_KEY_SUBVOL:
 562                 printf("BTRFS_UUID_KEY_SUBVOL");
 563                 break;
 564         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 565                 printf("BTRFS_UUID_KEY_RECEIVED_SUBVOL");
 566                 break;
 567         default:
 568                 printf("UNKNOWN.%d", type);
 569         };
 570 }
 571
 572 static void print_objectid(u64 objectid, u8 type)
 573 {
 574         switch (type) {
 575         case BTRFS_DEV_EXTENT_KEY:
 576                 printf("%llu", (unsigned long long)objectid); /* device id */
 577                 return;
 578         case BTRFS_QGROUP_RELATION_KEY:
 579                 printf("%llu/%llu", objectid >> 48,
 580                         objectid & ((1ll << 48) - 1));
 581                 return;
 582         case BTRFS_UUID_KEY_SUBVOL:
 583         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 584                 printf("0x%016llx", (unsigned long long)objectid);
 585                 return;
 586         }
 587
 588         switch (objectid) {
 589         case BTRFS_ROOT_TREE_OBJECTID:
 590                 if (type == BTRFS_DEV_ITEM_KEY)
 591                         printf("DEV_ITEMS");
 592                 else
 593                         printf("ROOT_TREE");
 594                 break;
 595         case BTRFS_EXTENT_TREE_OBJECTID:
 596                 printf("EXTENT_TREE");
 597                 break;
 598         case BTRFS_CHUNK_TREE_OBJECTID:
 599                 printf("CHUNK_TREE");
 600                 break;
 601         case BTRFS_DEV_TREE_OBJECTID:
 602                 printf("DEV_TREE");
 603                 break;
 604         case BTRFS_FS_TREE_OBJECTID:
 605                 printf("FS_TREE");
 606                 break;
 607         case BTRFS_ROOT_TREE_DIR_OBJECTID:
 608                 printf("ROOT_TREE_DIR");
 609                 break;
 610         case BTRFS_CSUM_TREE_OBJECTID:
 611                 printf("CSUM_TREE");
 612                 break;
 613         case BTRFS_BALANCE_OBJECTID:
 614                 printf("BALANCE");
 615                 break;
 616         case BTRFS_ORPHAN_OBJECTID:
 617                 printf("ORPHAN");
 618                 break;
 619         case BTRFS_TREE_LOG_OBJECTID:
 620                 printf("TREE_LOG");
 621                 break;
 622         case BTRFS_TREE_LOG_FIXUP_OBJECTID:
 623                 printf("LOG_FIXUP");
 624                 break;
 625         case BTRFS_TREE_RELOC_OBJECTID:
 626                 printf("TREE_RELOC");
 627                 break;
 628         case BTRFS_DATA_RELOC_TREE_OBJECTID:
 629                 printf("DATA_RELOC_TREE");
 630                 break;
 631         case BTRFS_EXTENT_CSUM_OBJECTID:
 632                 printf("EXTENT_CSUM");
 633                 break;
 634         case BTRFS_FREE_SPACE_OBJECTID:
 635                 printf("FREE_SPACE");
 636                 break;
 637         case BTRFS_FREE_INO_OBJECTID:
 638                 printf("FREE_INO");
 639                 break;
 640         case BTRFS_QUOTA_TREE_OBJECTID:
 641                 printf("QUOTA_TREE");
 642                 break;
 643         case BTRFS_UUID_TREE_OBJECTID:
 644                 printf("UUID_TREE");
 645                 break;
 646         case BTRFS_MULTIPLE_OBJECTIDS:
 647                 printf("MULTIPLE");
 648                 break;
 649         case (u64)-1:
 650                 printf("-1");
 651                 break;
 652         case BTRFS_FIRST_CHUNK_TREE_OBJECTID:
 653                 if (type == BTRFS_CHUNK_ITEM_KEY) {
 654                         printf("FIRST_CHUNK_TREE");
 655                         break;
 656                 }
 657                 /* fall-thru */
 658         default:
 659                 printf("%llu", (unsigned long long)objectid);
 660         }
 661 }
 662
 663 void btrfs_print_key(struct btrfs_disk_key *disk_key)
 664 {
 665         u64 objectid = btrfs_disk_key_objectid(disk_key);
 666         u8 type = btrfs_disk_key_type(disk_key);
 667         u64 offset = btrfs_disk_key_offset(disk_key);
 668
 669         printf("key (");
 670         print_objectid(objectid, type);
 671         printf(" ");
 672         print_key_type(objectid, type);
 673         switch (type) {
 674         case BTRFS_QGROUP_RELATION_KEY:
 675         case BTRFS_QGROUP_INFO_KEY:
 676         case BTRFS_QGROUP_LIMIT_KEY:
 677                 printf(" %llu/%llu)", (unsigned long long)(offset >> 48),
 678                         (unsigned long long)(offset & ((1ll << 48) - 1)));
 679                 break;
 680         case BTRFS_UUID_KEY_SUBVOL:
 681         case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 682                 printf(" 0x%016llx)", (unsigned long long)offset);
 683                 break;
 684         default:
 685                 if (offset == (u64)-1)
 686                         printf(" -1)");
 687                 else
 688                         printf(" %llu)", (unsigned long long)offset);
 689                 break;
 690         }
 691 }
 692
 693 static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
 694                             u32 item_size)
 695 {
 696         if (item_size & (sizeof(u64) - 1)) {
 697                 printf("btrfs: uuid item with illegal size %lu!\n",
 698                        (unsigned long)item_size);
 699                 return;
 700         }
 701         while (item_size) {
 702                 __le64 subvol_id;
 703
 704                 read_extent_buffer(l, &subvol_id, offset, sizeof(u64));
 705                 printf("\t\tsubvol_id %llu\n",
 706                         (unsigned long long)le64_to_cpu(subvol_id));
 707                 item_size -= sizeof(u64);
 708                 offset += sizeof(u64);
 709         }
 710 }
 711
 712 void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
 713 {
 714         int i;
 715         char *str;
 716         struct btrfs_item *item;
 717         struct btrfs_dir_item *di;
 718         struct btrfs_inode_item *ii;
 719         struct btrfs_file_extent_item *fi;
 720         struct btrfs_block_group_item *bi;
 721         struct btrfs_extent_data_ref *dref;
 722         struct btrfs_shared_data_ref *sref;
 723         struct btrfs_inode_ref *iref;
 724         struct btrfs_inode_extref *iref2;
 725         struct btrfs_dev_extent *dev_extent;
 726         struct btrfs_disk_key disk_key;
 727         struct btrfs_block_group_item bg_item;
 728         struct btrfs_dir_log_item *dlog;
 729         struct btrfs_qgroup_info_item *qg_info;
 730         struct btrfs_qgroup_limit_item *qg_limit;
 731         struct btrfs_qgroup_status_item *qg_status;
 732         u32 nr = btrfs_header_nritems(l);
 733         u64 objectid;
 734         u32 type;
 735
 736         printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
 737                 (unsigned long long)btrfs_header_bytenr(l), nr,
 738                 btrfs_leaf_free_space(root, l),
 739                 (unsigned long long)btrfs_header_generation(l),
 740                 (unsigned long long)btrfs_header_owner(l));
 741         print_uuids(l);
 742         fflush(stdout);
 743         for (i = 0 ; i < nr ; i++) {
 744                 item = btrfs_item_nr(i);
 745                 btrfs_item_key(l, &disk_key, i);
 746                 objectid = btrfs_disk_key_objectid(&disk_key);
 747                 type = btrfs_disk_key_type(&disk_key);
 748                 printf("\titem %d ", i);
 749                 btrfs_print_key(&disk_key);
 750                 printf(" itemoff %d itemsize %d\n",
 751                         btrfs_item_offset(l, item),
 752                         btrfs_item_size(l, item));
 753
 754                 if (type == 0 && objectid == BTRFS_FREE_SPACE_OBJECTID)
 755                         print_free_space_header(l, i);
 756
 757                 switch (type) {
 758                 case BTRFS_INODE_ITEM_KEY:
 759                         ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
 760                         printf("\t\tinode generation %llu transid %llu size %llu block group %llu mode %o links %u\n",
 761                                (unsigned long long)btrfs_inode_generation(l, ii),
 762                                (unsigned long long)btrfs_inode_transid(l, ii),
 763                                (unsigned long long)btrfs_inode_size(l, ii),
 764                                (unsigned long long)btrfs_inode_block_group(l,ii),
 765                                btrfs_inode_mode(l, ii),
 766                                btrfs_inode_nlink(l, ii));
 767                         break;
 768                 case BTRFS_INODE_REF_KEY:
 769                         iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
 770                         print_inode_ref_item(l, item, iref);
 771                         break;
 772                 case BTRFS_INODE_EXTREF_KEY:
 773                         iref2 = btrfs_item_ptr(l, i, struct btrfs_inode_extref);
 774                         print_inode_extref_item(l, item, iref2);
 775                         break;
 776                 case BTRFS_DIR_ITEM_KEY:
 777                 case BTRFS_DIR_INDEX_KEY:
 778                 case BTRFS_XATTR_ITEM_KEY:
 779                         di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
 780                         print_dir_item(l, item, di);
 781                         break;
 782                 case BTRFS_DIR_LOG_INDEX_KEY:
 783                 case BTRFS_DIR_LOG_ITEM_KEY:
 784                         dlog = btrfs_item_ptr(l, i, struct btrfs_dir_log_item);
 785                         printf("\t\tdir log end %Lu\n",
 786                                (unsigned long long)btrfs_dir_log_end(l, dlog));
 787                        break;
 788                 case BTRFS_ORPHAN_ITEM_KEY:
 789                         printf("\t\torphan item\n");
 790                         break;
 791                 case BTRFS_ROOT_ITEM_KEY:
 792                         print_root(l, i);
 793                         break;
 794                 case BTRFS_ROOT_REF_KEY:
 795                         print_root_ref(l, i, "ref");
 796                         break;
 797                 case BTRFS_ROOT_BACKREF_KEY:
 798                         print_root_ref(l, i, "backref");
 799                         break;
 800                 case BTRFS_EXTENT_ITEM_KEY:
 801                         print_extent_item(l, i, 0);
 802                         break;
 803                 case BTRFS_METADATA_ITEM_KEY:
 804                         print_extent_item(l, i, 1);
 805                         break;
 806                 case BTRFS_TREE_BLOCK_REF_KEY:
 807                         printf("\t\ttree block backref\n");
 808                         break;
 809                 case BTRFS_SHARED_BLOCK_REF_KEY:
 810                         printf("\t\tshared block backref\n");
 811                         break;
 812                 case BTRFS_EXTENT_DATA_REF_KEY:
 813                         dref = btrfs_item_ptr(l, i, struct btrfs_extent_data_ref);
 814                         printf("\t\textent data backref root %llu "
 815                                "objectid %llu offset %llu count %u\n",
 816                                (unsigned long long)btrfs_extent_data_ref_root(l, dref),
 817                                (unsigned long long)btrfs_extent_data_ref_objectid(l, dref),
 818                                (unsigned long long)btrfs_extent_data_ref_offset(l, dref),
 819                                btrfs_extent_data_ref_count(l, dref));
 820                         break;
 821                 case BTRFS_SHARED_DATA_REF_KEY:
 822                         sref = btrfs_item_ptr(l, i, struct btrfs_shared_data_ref);
 823                         printf("\t\tshared data backref count %u\n",
 824                                btrfs_shared_data_ref_count(l, sref));
 825                         break;
 826                 case BTRFS_EXTENT_REF_V0_KEY:
 827 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
 828                         print_extent_ref_v0(l, i);
 829 #else
 830                         BUG();
 831 #endif
 832                         break;
 833                 case BTRFS_CSUM_ITEM_KEY:
 834                         printf("\t\tcsum item\n");
 835                         break;
 836                 case BTRFS_EXTENT_CSUM_KEY:
 837                         printf("\t\textent csum item\n");
 838                         break;
 839                 case BTRFS_EXTENT_DATA_KEY:
 840                         fi = btrfs_item_ptr(l, i,
 841                                             struct btrfs_file_extent_item);
 842                         print_file_extent_item(l, item, i, fi);
 843                         break;
 844                 case BTRFS_BLOCK_GROUP_ITEM_KEY:
 845                         bi = btrfs_item_ptr(l, i,
 846                                             struct btrfs_block_group_item);
 847                         read_extent_buffer(l, &bg_item, (unsigned long)bi,
 848                                            sizeof(bg_item));
 849                         printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
 850                                (unsigned long long)btrfs_block_group_used(&bg_item),
 851                                (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
 852                                (unsigned long long)btrfs_block_group_flags(&bg_item));
 853                         break;
 854                 case BTRFS_CHUNK_ITEM_KEY:
 855                         print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
 856                         break;
 857                 case BTRFS_DEV_ITEM_KEY:
 858                         print_dev_item(l, btrfs_item_ptr(l, i,
 859                                         struct btrfs_dev_item));
 860                         break;
 861                 case BTRFS_DEV_EXTENT_KEY:
 862                         dev_extent = btrfs_item_ptr(l, i,
 863                                                     struct btrfs_dev_extent);
 864                         printf("\t\tdev extent chunk_tree %llu\n"
 865                                "\t\tchunk objectid %llu chunk offset %llu "
 866                                "length %llu\n",
 867                                (unsigned long long)
 868                                btrfs_dev_extent_chunk_tree(l, dev_extent),
 869                                (unsigned long long)
 870                                btrfs_dev_extent_chunk_objectid(l, dev_extent),
 871                                (unsigned long long)
 872                                btrfs_dev_extent_chunk_offset(l, dev_extent),
 873                                (unsigned long long)
 874                                btrfs_dev_extent_length(l, dev_extent));
 875                         break;
 876                 case BTRFS_QGROUP_STATUS_KEY:
 877                         qg_status = btrfs_item_ptr(l, i,
 878                                         struct btrfs_qgroup_status_item);
 879                         printf("\t\tversion %llu generation %llu flags %#llx "
 880                                 "scan %lld\n",
 881                                 (unsigned long long)
 882                                 btrfs_qgroup_status_version(l, qg_status),
 883                                 (unsigned long long)
 884                                 btrfs_qgroup_status_generation(l, qg_status),
 885                                 (unsigned long long)
 886                                 btrfs_qgroup_status_flags(l, qg_status),
 887                                 (unsigned long long)
 888                                 btrfs_qgroup_status_scan(l, qg_status));
 889                         break;
 890                 case BTRFS_QGROUP_RELATION_KEY:
 891                         break;
 892                 case BTRFS_QGROUP_INFO_KEY:
 893                         qg_info = btrfs_item_ptr(l, i,
 894                                                  struct btrfs_qgroup_info_item);
 895                         printf("\t\tgeneration %llu\n"
 896                              "\t\treferenced %llu referenced compressed %llu\n"
 897                              "\t\texclusive %llu exclusive compressed %llu\n",
 898                                (unsigned long long)
 899                                btrfs_qgroup_info_generation(l, qg_info),
 900                                (unsigned long long)
 901                                btrfs_qgroup_info_referenced(l, qg_info),
 902                                (unsigned long long)
 903                                btrfs_qgroup_info_referenced_compressed(l,
 904                                                                        qg_info),
 905                                (unsigned long long)
 906                                btrfs_qgroup_info_exclusive(l, qg_info),
 907                                (unsigned long long)
 908                                btrfs_qgroup_info_exclusive_compressed(l,
 909                                                                       qg_info));
 910                         break;
 911                 case BTRFS_QGROUP_LIMIT_KEY:
 912                         qg_limit = btrfs_item_ptr(l, i,
 913                                          struct btrfs_qgroup_limit_item);
 914                         printf("\t\tflags %llx\n"
 915                              "\t\tmax referenced %lld max exclusive %lld\n"
 916                              "\t\trsv referenced %lld rsv exclusive %lld\n",
 917                                (unsigned long long)
 918                                btrfs_qgroup_limit_flags(l, qg_limit),
 919                                (long long)
 920                                btrfs_qgroup_limit_max_referenced(l, qg_limit),
 921                                (long long)
 922                                btrfs_qgroup_limit_max_exclusive(l, qg_limit),
 923                                (long long)
 924                                btrfs_qgroup_limit_rsv_referenced(l, qg_limit),
 925                                (long long)
 926                                btrfs_qgroup_limit_rsv_exclusive(l, qg_limit));
 927                         break;
 928                 case BTRFS_UUID_KEY_SUBVOL:
 929                 case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
 930                         print_uuid_item(l, btrfs_item_ptr_offset(l, i),
 931                                         btrfs_item_size_nr(l, i));
 932                         break;
 933                 case BTRFS_STRING_ITEM_KEY:
 934                         /* dirty, but it's simple */
 935                         str = l->data + btrfs_item_ptr_offset(l, i);
 936                         printf("\t\titem data %.*s\n", btrfs_item_size(l, item), str);
 937                         break;
 938                 case BTRFS_DEV_STATS_KEY:
 939                         printf("\t\tdevice stats\n");
 940                         break;
 941                 };
 942                 fflush(stdout);
 943         }
 944 }
 945
 946 void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int follow)
 947 {
 948         int i;
 949         u32 nr;
 950         u32 size;
 951         struct btrfs_disk_key disk_key;
 952         struct btrfs_key key;
 953
 954         if (!eb)
 955                 return;
 956         nr = btrfs_header_nritems(eb);
 957         if (btrfs_is_leaf(eb)) {
 958                 btrfs_print_leaf(root, eb);
 959                 return;
 960         }
 961         printf("node %llu level %d items %d free %u generation %llu owner %llu\n",
 962                (unsigned long long)eb->start,
 963                 btrfs_header_level(eb), nr,
 964                 (u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr,
 965                 (unsigned long long)btrfs_header_generation(eb),
 966                 (unsigned long long)btrfs_header_owner(eb));
 967         print_uuids(eb);
 968         fflush(stdout);
 969         size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
 970         for (i = 0; i < nr; i++) {
 971                 u64 blocknr = btrfs_node_blockptr(eb, i);
 972                 btrfs_node_key(eb, &disk_key, i);
 973                 btrfs_disk_key_to_cpu(&key, &disk_key);
 974                 printf("\t");
 975                 btrfs_print_key(&disk_key);
 976                 printf(" block %llu (%llu) gen %llu\n",
 977                        (unsigned long long)blocknr,
 978                        (unsigned long long)blocknr / size,
 979                        (unsigned long long)btrfs_node_ptr_generation(eb, i));
 980                 fflush(stdout);
 981         }
 982         if (!follow)
 983                 return;
 984
 985         for (i = 0; i < nr; i++) {
 986                 struct extent_buffer *next = read_tree_block(root,
 987                                              btrfs_node_blockptr(eb, i),
 988                                              size,
 989                                              btrfs_node_ptr_generation(eb, i));
 990                 if (!next) {
 991                         fprintf(stderr, "failed to read %llu in tree %llu\n",
 992                                 (unsigned long long)btrfs_node_blockptr(eb, i),
 993                                 (unsigned long long)btrfs_header_owner(eb));
 994                         continue;
 995                 }
 996                 if (btrfs_is_leaf(next) &&
 997                     btrfs_header_level(eb) != 1)
 998                         BUG();
 999                 if (btrfs_header_level(next) !=
1000                         btrfs_header_level(eb) - 1)
1001                         BUG();
1002                 btrfs_print_tree(root, next, 1);
1003                 free_extent_buffer(next);
1004         }
1005 }